SPHENOPHRYNE - American Museum of Natural History

2000 ZWEIFEL: PARTITION OF SPHENOPHRYNE
29
Fig. 13. Distribution of Austrochaperina derongo.
SVL 0.076, IN/SVL 0.098, EN/IN 0.771,
HD/SV 0.222, FT/SV 0.433, FD/SVL 0.025,
TD/SVL 0.035.
Head narrower than body; snout subacute
in dorsal view, more so when viewed laterally,
strongly projecting; nostrils much closer
to tip of snout than to eye, lateral, barely visible
from above; canthus rostralis rounded,
loreal region nearly vertical, shallowly concave.
Eyes small, lateral, interorbital space
more than twice width of upper eyelid. Tympanum
obscure, about 2 mm diameter, about
its own diameter from posterior corner of
eye. Relative finger lengths 3 4 2 1,
first reaching to anterior edge of subarticular
elevation of second; all with terminal discs,
that of third finger twice width of penultimate
phalanx, of first finger only slightly
broader than penultimate phalanx; subarticular
elevations low, rounded, and inconspicuous,
inner and outer metacarpal elevations
scarcely evident. Relative toe lengths 4 3
5 2 1, first toe short, reaching to base
of subarticular elevation of second; all toes
with terminal discs, that of fourth toe about
twice width of penultimate phalanx and wider
than disc of third finger; subarticular elevations
low, rounded, and inconspicuous, inner
metatarsal elevation low, no outer elevation.
Body essentially smooth, with only a
weak postocular fold passing diagonally
from the eye over the upper edge of the tympanum
toward the arm.
The dorsal ground color in preservative is
gray-brown with inconspicuous darker
speckles and a pale band extending a short
distance behind the eye on the dorsal surface
of the head. The paler ground color of the
loreal region extends to the ear and is overlain
with darker speckles on the loreal region
and upper lip. The sides of the body, the
groin, and anterior surfaces of the thighs also
show a pale ground color with darker speckles,
verging on mottling on the thighs. The
upper surfaces of the limbs are colored and
patterned like the dorsum of the body, but
with the markings more clustered. The posterior
surfaces of the thighs resemble the dorsum—brown
with darker speckling in no
particular pattern. The ventral surfaces are
pale and unmarked except for faint melanic
clusters on the shanks. The soles are brown
with pale irregular markings.
VARIATION IN TYPE SERIES: Among specimens
from Western, Simbu, and Gulf Provinces,
the largest of ten adult males measures
36.9 mm SVL, the largest of 33 adult females
49.7 mm. Males in this series mature
at about 32–33 mm SVL, for individuals
both with and without vocal slits lie in this